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For the Inventor, By the Inventor

Matsudo, Japan

Excell Corporation

Calculating rank
USPTO Granted Patents = 23

% Expired Patents = 13.0


Trademarks = 3

Forward Citations = 180

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12 inventors (with patents filed for the assignee):

goldMedal Tatsuya Nakagawa (16 out of 16 patents)

silverMedal Yasuo Ezaki (12 out of 12 patents)

bronzeMedal Shoji Shimizu (3 out of 3 patents)

4.  Takashi Tamura (2 out of 52 patents)

5.  Masahiro Kimura (1 out of 100 patents)

6.  Takahiro Onishi (1 out of 1 patent)

7.  Kuniharu Tobe (1 out of 3 patents)

8.  Katsunobu Nishida (1 out of 1 patent)

9.  Nobumasa Tatara (1 out of 1 patent)

10.  Tatsuhiko Mukawa (1 out of 4 patents)

11.  Thomas Christopher Rumler (1 out of 2 patents)

12.  Hiroo Kawano (1 out of 3 patents)

13.  Takahiro Onishi (0 patent)


23 patents:

1. 12140199 - Dust cover, suspension device, and method for manufacturing dust cover (2024-11-12),
2. 10221757 - Intake joint structure for turbocharger (2019-03-05),
3. 9822740 - Air intake duct and method for producing same (2017-11-21),
4. 9358718 - Shielding structure of a through-hole formed in a wall of a plastic hollow product (2016-06-07),
5. 7678324 - Method for forming a hollow plastic product (2010-03-16),
6. 7316427 - Hollow plastic product having a connector pipe (2008-01-08),
7. 6537484 - Method for manufacturing a multi-layer plastic pipe (2003-03-25),
8. 6319454 - Method and apparatus for manufacturing a hollow plastic product (2001-11-20),
9. 6251332 - Method for manufacturing a multilayer plastic pipe (2001-06-26),
10. 6119731 - Hollow plastic product (2000-09-19),
11. 5851456 - Method for manufacturing a multi-layer plastic product (1998-12-22),
12. 5723828 - Hollow plastic product having a sound attenuator (1998-03-03),
13. 5720525 - Vehicle seat with anti-rattle arm rest (1998-02-24),
14. 5699835 - Multi-layer plastic hollow pipe (1997-12-23),
15. 5653265 - Hollow plastic product (1997-08-05),
Company Overview
Excell Corporation, headquartered in Matsudo, Japan, specializes in the development and manufacturing of advanced electronic components and systems. The company focuses on innovative solutions in the fields of telecommunications, automotive electronics, and industrial automation. With a commitment to research and development, Excell aims to enhance connectivity and efficiency across various sectors, contributing to the advancement of technology in both domestic and international markets.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 3 2026

23 Patents

#1 in Matsudo

#2,707 in Japan

#27,744 in the World

Matsudo, JP
Matsudo, Japan

Excell Corporation

Forward Citations = 180

12 inventors:

goldMedal Tatsuya Nakagawa (16 out of 16 patents)

silverMedal Yasuo Ezaki (12 out of 12 patents)

bronzeMedal Shoji Shimizu (3 out of 3 patents)

4.  Takashi Tamura (2 out of 52 patents)

5.  Masahiro Kimura (1 out of 100 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Excell Corporation. Retrieved from https://idiyas.com/company/excell

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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